My 7400 in 270 would not feed (stock magazine) any round with a bulket design that had any flat or open component to the tip. This meant that Barnes X-Bullets and any soft point that was not a well-formed point did not feed. Nosler Ballistic Tips and the like were the only ones that worked.

Having got past that hurdle, I did not notice any issues with cycling of any factory rounds at any weight.